diff options
| -rw-r--r-- | llvm/lib/Support/Unix/Path.inc | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/llvm/lib/Support/Unix/Path.inc b/llvm/lib/Support/Unix/Path.inc index 5eba86d2077..57385baaf34 100644 --- a/llvm/lib/Support/Unix/Path.inc +++ b/llvm/lib/Support/Unix/Path.inc @@ -107,7 +107,11 @@ test_dir(char ret[PATH_MAX], const char *dir, const char *bin) struct stat sb; char fullpath[PATH_MAX]; - snprintf(fullpath, PATH_MAX, "%s/%s", dir, bin); + int chars = snprintf(fullpath, PATH_MAX, "%s/%s", dir, bin); + // We cannot write PATH_MAX characters because the string will be terminated + // with a null character. Fail if truncation happened. + if (chars >= PATH_MAX) + return 1; if (!realpath(fullpath, ret)) return 1; if (stat(fullpath, &sb) != 0) |
